arrays/expenses-tracker.js

const account = {
    name: 'Andrew Mead',
    expenses: [],
    income: [],
    addExpense: function (description, amount) {
        this.expenses.push({description, amount})
    },
    addIncome: function (description, amount) {
        this.income.push({
            description: description,
            amount: amount
        })
    },
    getAccountSummary: function () {
        let total = 0
        let totalIncome = 0
        let totalExpenses = 0

        this.expenses.forEach(function(expense) {
            totalExpenses = totalExpenses + expense.amount
        })
        
        this.income.forEach(function(income){
            totalIncome = totalIncome + income.amount
        })

        total = totalIncome - totalExpenses

        return `${this.name} has a balance of $${total}. $${totalIncome} in income. $${totalExpenses} in expenses.`
    }  
}

// Expenses --> description, amount
// addExpenses - description, amount

// getAccountSummary - total up all expenses --> Andrew Mead has $1250 in expenses.

// 1. add income arrray to account
// 2. add income method -> description, amount 
// 3. Tweak getAccountSummary 

// Andrew Mead has a balance of $10. $100 in income. $90 in expenses. 
account.addExpense('Rent', 950)
account.addExpense('Coffee', 2)
account.addIncome('Job', 1000)
console.log(account.getAccountSummary())
console.log(account.expenses)
console.log(account.income)